Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 114 insertions, 0 deletions

diff --git a/chrome/common/child_process.cc b/chrome/common/child_process.cc
new file mode 100644
index 0000000..9c4310a
--- /dev/null
+++ b/chrome/common/child_process.cc
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <windows.h>
+#include "chrome/common/child_process.h"
+
+#include "base/basictypes.h"
+
+ChildProcess* ChildProcess::child_process_;
+MessageLoop* ChildProcess::main_thread_loop_;
+LONG ChildProcess::ref_count_;
+HANDLE ChildProcess::shutdown_event_;
+
+
+ChildProcess::ChildProcess() {
+  DCHECK(!child_process_);
+}
+
+ChildProcess::~ChildProcess() {
+  DCHECK(child_process_ == this);
+}
+
+// Called on any thread
+void ChildProcess::AddRefProcess() {
+  InterlockedIncrement(&ref_count_);
+}
+
+// Called on any thread
+void ChildProcess::ReleaseProcess() {
+  DCHECK(ref_count_ > 0);
+  DCHECK(child_process_);
+  if (InterlockedDecrement(&ref_count_) == 0)
+    child_process_->OnFinalRelease();
+}
+
+void ChildProcess::OnFinalRelease() {
+  DCHECK(main_thread_loop_);
+  main_thread_loop_->Quit();
+}
+
+HANDLE ChildProcess::GetShutDownEvent() {
+  return shutdown_event_;
+}
+
+// On error, it is OK to leave the global pointers, as long as the only
+// non-NULL pointers are valid. GlobalCleanup will always get called, which
+// will delete any non-NULL services.
+bool ChildProcess::GlobalInit(const std::wstring &channel_name,
+                              ChildProcessFactoryInterface *factory) {
+  // OK to be called multiple times.
+  if (main_thread_loop_)
+    return true;
+
+  if (channel_name.empty()) {
+    NOTREACHED() << "Unable to get the channel name";
+    return false;
+  }
+
+  // Remember the current message loop, so we can communicate with this thread
+  // again when we need to shutdown (see ReleaseProcess).
+  main_thread_loop_ = MessageLoop::current();
+
+  // An event that will be signalled when we shutdown.
+  shutdown_event_ = CreateEvent(NULL, TRUE, FALSE, NULL);
+
+  child_process_ = factory->Create(channel_name);
+  return true;
+}
+
+void ChildProcess::GlobalCleanup() {
+  // Signal this event before destroying the child process.  That way all
+  // background threads.
+  // For example, in the renderer the RenderThread instances will be able to
+  // notice shutdown before the render process begins waiting for them to exit.
+  SetEvent(shutdown_event_);
+
+  // Destroy the child process first to force all background threads to
+  // terminate before we bring down other resources.  (We null pointers
+  // just in case.)
+  child_process_->Cleanup();
+  delete child_process_;
+  child_process_ = NULL;
+
+  main_thread_loop_ = NULL;
+
+  CloseHandle(shutdown_event_);
+  shutdown_event_ = NULL;
+}